Malicious PDF — malware analysis report

Static analysis result for SHA-256 465f7b43fce0f967…

MALICIOUS

PDF

82.4 KB Created: 2021-05-16 19:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eabda3405c4816419367e79761db18de SHA-1: dbf989542d2769c3aea56bfef8968b9b2e1b943e SHA-256: 465f7b43fce0f967fb504232cc3725c98d98128ded29c1e91576723201779e4f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that, when clicked, leads to a phishing lure related to HVAC repair costs. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest a phishing campaign, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://zajinet.ru/strik?utm_term=how+much+does+hvac+repair+cost
    • https://cdn.sqhk.co/torazanopuni/iep2gfW/50202225429.pdf
    • https://cdn.sqhk.co/mixaluwekitu/YheEujf/tic_tac_toe_drinking_game_with_cups.pdf
    • https://cdn.sqhk.co/ximirujusuxo/ghhehdn/secure_folder_app_samsung.pdf
    • https://cdn.sqhk.co/nodujugebi/NihjjjL/my_first_piano_adventure_book_c.pdf
    • https://cdn.sqhk.co/xejadukoxeta/kjawjd8/sonic_adventure_2_chao_ball_color.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d1f5a7df-5853-40b9-96a8-416a878117d5/karr_security_system_ford.pdf
    • https://s3.amazonaws.com/wivunonovef/mogujevufusosumaxikopuz.pdf
    • http://gukupexokopiwug.epizy.com/sususodofimofonunatisepe.pdf
    • https://uploads.strikinglycdn.com/files/37466efd-ecd7-4aaf-a8f1-100efeecb7cb/54476311663.pdf
    • https://s3.amazonaws.com/pazatuv/dark_souls_2_ps4_review.pdf
    • http://kozifina.epizy.com/10499336139.pdf
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_04ec383eabf84189a7a9789d37d1e6de.pdf?index=true
    • https://e905e09d-7ddd-4aab-833c-73500e817873.filesusr.com/ugd/f4c08b_65225fd610a0402194f54832164bb917.pdf?index=true
    • https://s3.amazonaws.com/tujeviwakirawu/ashampoo_free_10.pdf
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_a06ffdcdd8d641a1aafa883c03eb78e7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2a59b741-2761-4e28-9558-f163d5a6b153/best_free_switch_games_2021.pdf
    • https://uploads.strikinglycdn.com/files/02739737-b994-4df4-8773-14b656db694f/52450211769.pdf
    • https://770603ce-cae8-48b7-b4e8-6e15b9dac1cd.filesusr.com/ugd/e975af_37e1e7bce5bc47b9a3b7653feb7e944b.pdf?index=true
    • http://bivuraxut.rf.gd/how_to_create_a_google_excel_spreadsheet.pdf
    • http://nadoniwofak.rf.gd/kivalitufasudelo.pdf
    • https://uploads.strikinglycdn.com/files/1e7f5fbf-73dd-4f4d-b336-ea5db090f8fe/migogafedamajododogirun.pdf
    • http://feneluveje.epizy.com/21327683505.pdf
    • https://s3.amazonaws.com/pibabopuduj/23243889693.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001041a.bin
8b0f3e7c6eaa3314227833e8a8da4e47fe07f0565057565f5385eaa1fb693683		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1041A 5396 bytes
font_01_sfnt_off0001165c.bin
c7516c0f3c186223c31c56121a5a4478f03e3cfffe2012db2967f0ad02361336		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1165C 11072 bytes

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